With the chains of squares the qudrature could be deepened, for example 5 x 5. The chains of cubic and cubes illustrate arithmetic operations like 9 x 9 x 9. This means that large numbers will be comprehensible and easy to understand for small children.
Example of use: showing and learning of a quadrature of a number
Control for success: is guaranteed with comparing and counting the pearls.
The article consists of 10 chains of squares (1-10), 10 chains of cubic (1-10), 10 cubes (1-10) 1single pearl; pearl squares from 1-10 material: plastic, diameter approx. 7Mm